package com.sky.aspect;


//自定义切面，实现公共字段自动填充处理逻辑

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    //切入点

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){

    }

    //前置通知，在通知中进行公共字段的赋值
   @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充");
       MethodSignature signature = (MethodSignature)joinPoint.getSignature();//方法签名对象
       AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
       OperationType operationType = annotation.value();//获得数据库操作类型

       Object[] args = joinPoint.getArgs();//获得被拦截的方法的参数--实体对象
       if(args == null || args.length==0){
           return;
       }

       Object entity =  args[0];
       LocalDateTime now = LocalDateTime.now();
       Long currentId = BaseContext.getCurrentId();

       if(operationType == OperationType.INSERT){
           try {
               Method setCreatTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
               Method setCreatUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
               Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
               Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

               setCreatTime.invoke(entity,now);
               setCreatUser.invoke(entity,currentId);
               setUpdateTime.invoke(entity,now);
               setUpdateUser.invoke(entity,currentId);

           } catch (Exception e) {
               throw new RuntimeException(e);
           }
       }else if (operationType == OperationType.UPDATE){
           try {
               Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
               Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

               setUpdateTime.invoke(entity,now);
               setUpdateUser.invoke(entity,currentId);

           } catch (Exception e) {
               throw new RuntimeException(e);
           }
       }

   }
}
